Family name Črnko (Črnko 
) , worldwide, is a rare cognomen. The last name Črnko is habitual in Southern Europe, particularly Croatia, where it is quite a rare surname, and Slovenia.
| jernej črnko Slovene agronomist, SI (b. 1925) |
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| zvonimir črnko Croatian actor (1936-2008), HR (b. 1936) |
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| alenka črnko SI |
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| nenad črnko SI |
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| brina črnko SI |
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| mladen črnko SI |
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| lidija črnko SI |
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| petra črnko Slovene association football player, SI (b. 1990) |
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Ana, Barica, Branko, Damjan, Tamara, Nikola, Marijan, Barbara, Dominik, Dražen, Nevenka, Emanuel, Željko, Željka, Mihajela, Antonijo, Katarina, Dragutin, Sandro, Sandra, Monika, Mateja, Sara, Beno, Nino, Ivan, Marta, Matea, Majda, Anica, Zvonimir, Petra, Dunja, Laura, Josip, Tanja, Nenad, Vesna, Ivica, Marija, David, and Zvjezdana